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3 years ago

14

Colin and Dan are making exam papers each set takes Colin 23 minutes and Dan one hour express the time Colin and Dan take as a r

atio in its simplest form

1 answer:

Alchen [17]3 years ago

7 0

Answer:

23

Step-by-step explanation:

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Find a ⋅ b. a = <5, 2>, b = <4, 5>

cestrela7 [59]

Answer:

30

Step-by-step explanation:

For a = <xa, ya> and b = <xb, yb>, the dot product is the sum of products ...

a·b = (xa)(xb) + (ya)(yb)

Substituting the given information, you have ...

a·b = 5·4 + 2·5 = 20 + 10

a·b = 30

_____

Some graphing calculators can do such math. There are also dot product calculators available on the Internet. If you have quite a few of these to calculate, you can put the appropriate formula into a spreadsheet.

6 0

3 years ago

The real car is 8 feet long and the model is 6 inches long. What is the ratio of the length of the car to the length of the mode

Lubov Fominskaja [6]

6 : 8
hope this helps ^^

8 0

2 years ago

Which is the graph of the equation y- 1= 5(x-3)?

Helen [10]

Answer:

linked below

Step-by-step explanation:

If you use desmos, it show this which is the correct graph :)

8 0

2 years ago

4 1/6 as a decimal<br> : D

bixtya [17]

Answer: 4.1666666666667

8 0

1 year ago

3. A man needed money for college. He borrowed $6,000 at 14% simple interest per year. If he paid $420 interest, what was the du

9966 [12]

Answer: half year

Step-by-step explanation:

The formula to find the simple interest is given by :-

$I=Prt$ , , where P is the principal amount , r is the rate of interest and t is the time in year.

Given : I=420 ; r=14%=0.14 and P =$6000

Then, we have the following equation :-

$420=6000\times0.14 \times t\\\\\Rightarrow\ t=\dfrac{420}{6000\times0.14}=0.5$

It means the duration of the loan is half year .

6 0

3 years ago